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<title>class Gem::Resolver::Molinillo::VersionConflict - rubygems: Ruby Standard Library Documentation</title>


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  <p class="link"><a href="ResolverError.html">Gem::Resolver::Molinillo::ResolverError</a>
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    <main role="main" aria-labelledby="class-Gem::Resolver::Molinillo::VersionConflict">
    <h1 id="class-Gem::Resolver::Molinillo::VersionConflict" class="class">
      class Gem::Resolver::Molinillo::VersionConflict
    </h1>

    <section class="description">
    
<p>An error caused by conflicts in version</p>

    </section>

      <section id="5Buntitled-5D" class="documentation-section">



        <section class="attribute-method-details" class="method-section">
        <header>
        <h3>Attributes</h3>
        </header>

          <div id="attribute-i-conflicts" class="method-detail">
            <div class="method-heading attribute-method-heading">
              <span class="method-name">conflicts</span><span
                class="attribute-access-type">[R]</span>
            </div>

            <div class="method-description">
              <p>@return [{String =&gt; Resolution::Conflict}] the conflicts that caused</p>

<pre class="ruby"><span class="ruby-identifier">resolution</span> <span class="ruby-identifier">to</span> <span class="ruby-identifier">fail</span>
</pre>
              </div>
            </div>
          <div id="attribute-i-specification_provider" class="method-detail">
            <div class="method-heading attribute-method-heading">
              <span class="method-name">specification_provider</span><span
                class="attribute-access-type">[R]</span>
            </div>

            <div class="method-description">
              <p>@return [SpecificationProvider] the specification provider used during</p>

<pre class="ruby"><span class="ruby-identifier">resolution</span>
</pre>
              </div>
            </div>
            </section>


                <section id="public-class-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Class Methods</h3>
                </header>

                  <div id="method-c-new" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">new</span><span
                                class="method-args">(conflicts, specification_provider)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Initializes a new error with the given version conflicts. @param [{String =&gt; Resolution::Conflict}] conflicts see {#conflicts} @param [SpecificationProvider] <a href="VersionConflict.html#attribute-i-specification_provider"><code>specification_provider</code></a> see {#specification_provider}</p>
                                <div class="method-calls-super">
                                  Calls superclass method
                                  
                              </div>

                              <div class="method-source-code" id="new-source">
            <pre><span class="ruby-comment"># File rubygems/resolver/molinillo/lib/molinillo/errors.rb, line 66</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">conflicts</span>, <span class="ruby-identifier">specification_provider</span>)
  <span class="ruby-identifier">pairs</span> = []
  <span class="ruby-identifier">conflicts</span>.<span class="ruby-identifier">values</span>.<span class="ruby-identifier">flat_map</span>(<span class="ruby-operator">&amp;</span><span class="ruby-value">:requirements</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">conflicting</span><span class="ruby-operator">|</span>
    <span class="ruby-identifier">conflicting</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">source</span>, <span class="ruby-identifier">conflict_requirements</span><span class="ruby-operator">|</span>
      <span class="ruby-identifier">conflict_requirements</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">c</span><span class="ruby-operator">|</span>
        <span class="ruby-identifier">pairs</span> <span class="ruby-operator">&lt;&lt;</span> [<span class="ruby-identifier">c</span>, <span class="ruby-identifier">source</span>]
      <span class="ruby-keyword">end</span>
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">super</span> <span class="ruby-string">&quot;Unable to satisfy the following requirements:\n\n&quot;</span> \
    <span class="ruby-node">&quot;#{pairs.map { |r, d| &quot;- `#{r}` required by `#{d}`&quot; }.join(&quot;\n&quot;)}&quot;</span>

  <span class="ruby-ivar">@conflicts</span> = <span class="ruby-identifier">conflicts</span>
  <span class="ruby-ivar">@specification_provider</span> = <span class="ruby-identifier">specification_provider</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                          </section>

                <section id="public-instance-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Instance Methods</h3>
                </header>

                  <div id="method-i-message_with_trees" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">message_with_trees</span><span
                                class="method-args">(opts = {})</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>@return [String] An error message that includes requirement trees,</p>

<pre>which is much more detailed &amp; customizable than the default message</pre>

<p>@param [Hash] opts the options to create a message with. @option opts [String] :solver_name The user-facing name of the solver @option opts [String] :possibility_type The generic name of a possibility @option opts [Proc] :reduce_trees A proc that reduced the list of requirement trees @option opts [Proc] :printable_requirement A proc that pretty-prints requirements @option opts [Proc] :additional_message_for_conflict A proc that appends additional</p>

<pre>messages for each conflict</pre>

<p>@option opts [Proc] :version_for_spec A proc that returns the version number for a</p>

<pre class="ruby"><span class="ruby-identifier">possibility</span>
</pre>

                              <div class="method-source-code" id="message_with_trees-source">
            <pre><span class="ruby-comment"># File rubygems/resolver/molinillo/lib/molinillo/errors.rb, line 97</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">message_with_trees</span>(<span class="ruby-identifier">opts</span> = {})
  <span class="ruby-identifier">solver_name</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:solver_name</span>) { <span class="ruby-keyword">self</span>.<span class="ruby-identifier">class</span>.<span class="ruby-identifier">name</span>.<span class="ruby-identifier">split</span>(<span class="ruby-string">&#39;::&#39;</span>).<span class="ruby-identifier">first</span> }
  <span class="ruby-identifier">possibility_type</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:possibility_type</span>) { <span class="ruby-string">&#39;possibility named&#39;</span> }
  <span class="ruby-identifier">reduce_trees</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:reduce_trees</span>) { <span class="ruby-identifier">proc</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">trees</span><span class="ruby-operator">|</span> <span class="ruby-identifier">trees</span>.<span class="ruby-identifier">uniq</span>.<span class="ruby-identifier">sort_by</span>(<span class="ruby-operator">&amp;</span><span class="ruby-value">:to_s</span>) } }
  <span class="ruby-identifier">printable_requirement</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:printable_requirement</span>) { <span class="ruby-identifier">proc</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">req</span><span class="ruby-operator">|</span> <span class="ruby-identifier">req</span>.<span class="ruby-identifier">to_s</span> } }
  <span class="ruby-identifier">additional_message_for_conflict</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:additional_message_for_conflict</span>) { <span class="ruby-identifier">proc</span> {} }
  <span class="ruby-identifier">version_for_spec</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:version_for_spec</span>) { <span class="ruby-identifier">proc</span>(<span class="ruby-operator">&amp;</span><span class="ruby-value">:to_s</span>) }
  <span class="ruby-identifier">incompatible_version_message_for_conflict</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:incompatible_version_message_for_conflict</span>) <span class="ruby-keyword">do</span>
    <span class="ruby-identifier">proc</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">name</span>, <span class="ruby-identifier">_conflict</span><span class="ruby-operator">|</span>
      <span class="ruby-node">%(#{solver_name} could not find compatible versions for #{possibility_type} &quot;#{name}&quot;:)</span>
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-identifier">full_message_for_conflict</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-value">:full_message_for_conflict</span>) <span class="ruby-keyword">do</span>
    <span class="ruby-identifier">proc</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">name</span>, <span class="ruby-identifier">conflict</span><span class="ruby-operator">|</span>
      <span class="ruby-identifier">o</span> = <span class="ruby-string">&quot;\n&quot;</span>.<span class="ruby-identifier">dup</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">incompatible_version_message_for_conflict</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">name</span>, <span class="ruby-identifier">conflict</span>) <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">&quot;\n&quot;</span>
      <span class="ruby-keyword">if</span> <span class="ruby-identifier">conflict</span>.<span class="ruby-identifier">locked_requirement</span>
        <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-node">%(  In snapshot (#{name_for_locking_dependency_source}):\n)</span>
        <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-node">%(    #{printable_requirement.call(conflict.locked_requirement)}\n)</span>
        <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">%(\n)</span>
      <span class="ruby-keyword">end</span>
      <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-node">%(  In #{name_for_explicit_dependency_source}:\n)</span>
      <span class="ruby-identifier">trees</span> = <span class="ruby-identifier">reduce_trees</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">conflict</span>.<span class="ruby-identifier">requirement_trees</span>)

      <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">trees</span>.<span class="ruby-identifier">map</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">tree</span><span class="ruby-operator">|</span>
        <span class="ruby-identifier">t</span> = <span class="ruby-string">&#39;&#39;</span>.<span class="ruby-identifier">dup</span>
        <span class="ruby-identifier">depth</span> = <span class="ruby-value">2</span>
        <span class="ruby-identifier">tree</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">req</span><span class="ruby-operator">|</span>
          <span class="ruby-identifier">t</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">&#39;  &#39;</span> <span class="ruby-operator">*</span> <span class="ruby-identifier">depth</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">printable_requirement</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">req</span>)
          <span class="ruby-keyword">unless</span> <span class="ruby-identifier">tree</span>.<span class="ruby-identifier">last</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">req</span>
            <span class="ruby-keyword">if</span> <span class="ruby-identifier">spec</span> = <span class="ruby-identifier">conflict</span>.<span class="ruby-identifier">activated_by_name</span>[<span class="ruby-identifier">name_for</span>(<span class="ruby-identifier">req</span>)]
              <span class="ruby-identifier">t</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-node">%( was resolved to #{version_for_spec.call(spec)}, which)</span>
            <span class="ruby-keyword">end</span>
            <span class="ruby-identifier">t</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">%( depends on)</span>
          <span class="ruby-keyword">end</span>
          <span class="ruby-identifier">t</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">%(\n)</span>
          <span class="ruby-identifier">depth</span> <span class="ruby-operator">+=</span> <span class="ruby-value">1</span>
        <span class="ruby-keyword">end</span>
        <span class="ruby-identifier">t</span>
      <span class="ruby-keyword">end</span>.<span class="ruby-identifier">join</span>(<span class="ruby-string">&quot;\n&quot;</span>)

      <span class="ruby-identifier">additional_message_for_conflict</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">o</span>, <span class="ruby-identifier">name</span>, <span class="ruby-identifier">conflict</span>)

      <span class="ruby-identifier">o</span>
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-identifier">conflicts</span>.<span class="ruby-identifier">sort</span>.<span class="ruby-identifier">reduce</span>(<span class="ruby-string">&#39;&#39;</span>.<span class="ruby-identifier">dup</span>) <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">o</span>, (<span class="ruby-identifier">name</span>, <span class="ruby-identifier">conflict</span>)<span class="ruby-operator">|</span>
    <span class="ruby-identifier">o</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">full_message_for_conflict</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">name</span>, <span class="ruby-identifier">conflict</span>)
  <span class="ruby-keyword">end</span>.<span class="ruby-identifier">strip</span>
<span class="ruby-keyword">end</span></pre>
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